Method

Place thinly sliced red onion in a large bowl.

Prepare an ice bath. Bring a small pot of salted water. Cook the green beans for 30 seconds to 1 minute or until bright green. Drain and transfer to the ice bath. Pat dry with paper towels and set aside.

Place potatoes in a small pot with salt and bring to a boil. Cook the potatoes until easily pierced with a knife.